| 活性炭负载纳米TiO2对腐殖酸光催化降解动力学 |
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| 引用本文： | 柳欢欢,柯玉娟,陈泉源,张立娜,罗周,王璐,杜菲菲.活性炭负载纳米TiO2对腐殖酸光催化降解动力学[J].环境科学学报,2009,29(9):1823-1931. |
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| 作者姓名： | 柳欢欢 柯玉娟 陈泉源 张立娜 罗周 王璐 杜菲菲 |
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| 作者单位： | 东华大学环境科学与工程学院,上海,201620 |
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| 基金项目： | 上海市重点学科建设项目(No.B604)~~ |
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| 摘 要： | 采用溶胶-凝胶法制备了以颗粒活性炭(GAC)为载体的纳米TiO2/AC复合催化剂,并将其用于腐殖酸的光催化降解.动力学研究表明,TiO2/AC光催化降解腐殖酸过程可用Langmuir-Hinshelwood(L-H)动力学模式表示.L-H表观反应速率常数KLH=0.1124mg·L-·1min-1,吸附平衡常数K*=0.3402L·mg-1.活性炭负载TiO2对腐殖酸的光催化降解过程,体现了活性炭与TiO2的协同作用,活性炭的吸附作用提高了光催化反应速率.
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| 关 键 词： | 纳米TiO2 腐殖酸 光催化降解 颗粒活性炭 动力学 |
| 收稿时间： | 2008/11/27 0:00:00 |
| 修稿时间： | 3/15/2009 4:57:20 PM |
Kinetics of photocatalytic degradation of humic acid by nano-TiO2 loaded on granular activated carbon |
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| LIU Huanhuan,KE Yujuan,CHEN Quanyuan,ZHANG Lin,LUO Zhou,WANG Lu and DU Feifei.Kinetics of photocatalytic degradation of humic acid by nano-TiO2 loaded on granular activated carbon[J].Acta Scientiae Circumstantiae,2009,29(9):1823-1931. |
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| Authors: | LIU Huanhuan KE Yujuan CHEN Quanyuan ZHANG Lin LUO Zhou WANG Lu and DU Feifei |
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| Institution: | School of Environmental Science and Engineering, Donghua University, Shanghai 201620,School of Environmental Science and Engineering, Donghua University, Shanghai 201620,School of Environmental Science and Engineering, Donghua University, Shanghai 201620,School of Environmental Science and Engineering, Donghua University, Shanghai 201620,School of Environmental Science and Engineering, Donghua University, Shanghai 201620,School of Environmental Science and Engineering, Donghua University, Shanghai 201620 and School of Environmental Science and Engineering, Donghua University, Shanghai 201620 |
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| Abstract: | A nano-TiO2/activated carbon composite photocatalyst was prepared by loading nano-TiO2 on the surfaces of granular activated carbon by a sol-gel method. The catalyst was then applied to the photocatalytic degradation of humic acid (HA). The kinetics of HA degradation can be expressed by the Langmuir-Hinshelwood (L-H) equation. The reaction rate constant KLH was 0.1124 mg·L-1·min-1, and the superficial adsorption equilibrium constant K* was 0.3402 L·mg-1. The photocatalytic degradation of humic acid by the nano-TiO2/activated carbon composite photocatalyst exhibited a synergetic effect. The adsorption of granular activated carbon greatly enhanced the photocatalysis of humic acid. |
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| Keywords: | nano-TiO2 humic acid photocatalytic degradation granular activated carbon kinetics |
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